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Cardiac Output Equation
CO = HR x SV (Somer's divided by 1000)
Cardiac Index (CI)
CI=CO/BSA
Fick Cardiac Output Equation
Oxygen consumption X BSA / (Arterial sat—Mixed Venous (PA) sat) x Hgb x 13.6
Mean Arterial Pressure (MAP)
MAP=(2DBP)+(1SBP) / 3
Flamm's Equation
3 (SVC) + 1 (IVC) / 4
Qp/Qs-Shunt Calculation
Qp/Qs = (Ao sat—MV sat) / (PV sat-PA sat)
Qp/Qs < 1.0 indicates
R → L shunt
Qp/Qs > 1.0 indicates
L → R shunt
Gorlin Formula for AVA
CO (cc's) / (SEP x HR) / 44.3 (square root mean gradient)
Gorlin Formula for MVA
CO (cc's) / (DFP x HR)/ 37.7 (square root mean gradient)
Hakki Formula for AVA
CO (L/min) / Square root of peak to peak gradient
Cardiac Output (CO)
measurement of the amount of blood ejected per minute from either ventricle of the
heart. (4-8 ml)
Cardiac Index (CI)
Measures cardiac output from the left ventricular. (2.5-4 L/min/m2)
Stroke Volume (SV)
The amount of blood pumped out of the heart with each contraction. (60 -100 ml)